# GST returns: GSTR-1 and GSTR-3B, section by section — Octyn

> Prepare GSTR-1 and GSTR-3B in Octyn for each GSTIN: read every section, add 3B adjustments, and download Excel or portal JSON.

Canonical: https://octynerp.com/help/gst-returns

# GST returns: GSTR-1 and GSTR-3B, section by section

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Prepare GSTR-1 and GSTR-3B in Octyn for each GSTIN: read every section, add 3B adjustments, and download Excel or portal JSON.

Video **4 min** Updated **14 October 2026** For **Owner or accountant** Tutorial **35 of 39**

## 01 Generate a return

GST is filed per GSTIN. Outlets that share a GSTIN produce one combined return.

1.  Go to **Compliance → GST returns**.
2.  Choose **1 · Outlet (GSTIN)**, **2 · Return** (GSTR-1 or GSTR-3B) and **3 · Period** (the month).
3.  Choose **Generate**. The return opens on its own page. Generating again later rebuilds the draft from your latest records.

## 02 Reading GSTR-1

One tab per section, in the columns your CA's GST software uses.

1.  The figures at the top: taxable value, tax, **Non-GST (petrol, diesel)** and nil-rated.
2.  **B2B** lists invoices to customers with a GSTIN, invoice by invoice. Add a credit customer's GSTIN in Station setup → Customers and their purchases move here.
3.  **B2C (others)** is all other counter sales by state and rate, net of their credit notes.
4.  **Exempt, Nil, Non-GST** carries petrol and diesel as non-GST supplies — the law asks for them in Table 8.
5.  **Cr notes** list voided sales to registered buyers; voids of ordinary counter sales are netted into B2C (others), as the portal expects.
6.  **HSN — registered / unregistered** summarise by HSN code, unit and rate; **Documents** lists the invoice and credit-note series used.
7.  Read any warning at the top — for example a product without an HSN code — fix it, then choose **Regenerate**.

## 03 Reading GSTR-3B

The monthly summary and the tax you pay.

1.  **3.1** shows outward taxable supplies, nil-rated, reverse-charge inward and, in (e), petrol and diesel as non-GST.
2.  **3.2** lists inter-state sales to unregistered buyers by state.
3.  **4 ITC** is the credit from counter-stock purchases and expenses — IGST where the supplier is in another state.
4.  **5** carries the oil company's fuel invoices as non-GST inward supplies.
5.  **Tax payable** shows each head after credit; a negative figure is credit carried forward.

## 04 Adjustments Octyn cannot work out

Reverse charge, ITC reversals, reclaimed or ineligible credit, interest and late fee come from your books.

1.  On a draft GSTR-3B, scroll to **Adjustments**.
2.  Enter the figures — for example transport (GTA) bills under reverse charge in **3.1(d)** and the matching credit in **4(A)(3)** — and a note for your CA.
3.  Choose **Save and rebuild**. The return is rebuilt with them, and they stay with it.

## 05 Download and file

Give your CA the Excel, or upload the JSON yourself.

1.  Choose **Excel (GST offline tool)** on GSTR-1. The latest GST offline-tool template (b2b,sez,de, b2cl, b2cs, cdnr, cdnur, exp, at, atadj, exemp, hsn(b2b), hsn(b2c), docs), plus a GSTR1 Report sheet listing every invoice and credit note, and an itemSummary sheet product by product.
2.  Choose **Portal JSON** to upload the return on the GST portal.
3.  After filing on the portal, choose **Mark filed**. Octyn does not submit anything to GSTN; Mark filed records what you did, and the return can no longer change.

**Done.** Both returns built from your own records, checked section by section, and ready to file. [Open it in Octyn](https://app.octynerp.com/compliance/gst).

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